sclang: fix accidental number literal

before
```
69ssssss // 69.4 ('s' is applied 4 times)
69bbbbbb // 68.4 ('b' is applied limitless)
```

fixed
```
69ssssss // 69.4 ('s' is applied 4 times)
69bbbbbb // 68.6 ('b' is applied 4 times)
```